| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Nanostructured Metal-Enhanced Photoluminescence of Micro-Sr2Si5N8:Eu2+ Phosphors |
| LIU Ling, XU Xiao-Liang**, LEI Jie-Mei, YIN Nai-Qiang |
Department of Physics, University of Science and Technology of China, Hefei 230026
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LIU Ling, XU Xiao-Liang, LEI Jie-Mei et al 2012 Chin. Phys. Lett. 29 017801 |
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Abstract The enhancement of the photoluminescence of micro-Sr2Si5N8:Eu2+ phosphors on the surface of Ag and Au nanoparticles is studied. Ag nanoparticles cause a considerable enhancement in the photoluminescence intensity of microsized Sr2Si5N8:Eu2+ phosphors. We further investigate the enhanced emission of self−assembled worm-like Au nanoparticles from Sr2Si5N8:Eu2+ phosphors. A brightness photoluminescence intensity enhanced by about six times is observed, and is due to the stronger scattering and higher numbers of hot spots in the Au worms. The luminescence efficiency of the microparticles is higher than the nanoparticles, and it is very difficult to enhance light emission. Therefore, the realization of microphosphor photoluminescence enhancement is a great breakthrough.
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| Keywords:
78.55.Et
78.66.Bz
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Received: 15 July 2011
Published: 07 February 2012
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